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Message-Id: <1426120815-32528-11-git-send-email-john.stultz@linaro.org>
Date: Wed, 11 Mar 2015 17:40:06 -0700
From: John Stultz <john.stultz@...aro.org>
To: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Cc: John Stultz <john.stultz@...aro.org>,
Shuah Khan <shuahkh@....samsung.com>,
Prarit Bhargava <prarit@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Richard Cochran <richardcochran@...il.com>
Subject: [PATCH 10/19] selftests/timers: Add adjtimex validation test from timetest suite
This adds a adjtimex validation test which checks the behavior
for a set of valida and invalid inputs. So far this only tests
ADJ_FREQUENCY, but hopefully will grow.
Cc: Shuah Khan <shuahkh@....samsung.com>
Cc: Prarit Bhargava <prarit@...hat.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Richard Cochran <richardcochran@...il.com>
Signed-off-by: John Stultz <john.stultz@...aro.org>
---
tools/testing/selftests/timers/Makefile | 11 +-
tools/testing/selftests/timers/valid-adjtimex.c | 202 ++++++++++++++++++++++++
2 files changed, 212 insertions(+), 1 deletion(-)
create mode 100644 tools/testing/selftests/timers/valid-adjtimex.c
diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index d0bfb2d..01b5a2e 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -3,10 +3,12 @@ BUILD_FLAGS = -DKTEST
CFLAGS += -O3 -Wl,-no-as-needed -Wall $(BUILD_FLAGS)
LDFLAGS += -lrt -lpthread
bins = posix_timers nanosleep inconsistency-check nsleep-lat raw_skew \
- set-timer-lat threadtest mqueue-lat
+ set-timer-lat threadtest mqueue-lat valid-adjtimex
all: ${bins}
+# these are all "safe" tests that don't modify
+# system time or require escalated privledges
run_tests: all
./posix_timers
./nanosleep
@@ -16,5 +18,12 @@ run_tests: all
./inconsistency-check
./raw_skew
./threadtest -t 30 -n 8
+
+# these tests require escalated privledges
+# and may modify the system time or trigger
+# other behavior like suspend
+run_destructive_tests: all
+ ./valid-adjtimex
+
clean:
rm -f ${bins}
diff --git a/tools/testing/selftests/timers/valid-adjtimex.c b/tools/testing/selftests/timers/valid-adjtimex.c
new file mode 100644
index 0000000..e86d937
--- /dev/null
+++ b/tools/testing/selftests/timers/valid-adjtimex.c
@@ -0,0 +1,202 @@
+/* valid adjtimex test
+ * by: John Stultz <john.stultz@...aro.org>
+ * (C) Copyright Linaro 2015
+ * Licensed under the GPLv2
+ *
+ * This test validates adjtimex interface with valid
+ * and invalid test data.
+ *
+ * Usage: valid-adjtimex
+ *
+ * To build:
+ * $ gcc valid-adjtimex.c -o valid-adjtimex -lrt
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/time.h>
+#include <sys/timex.h>
+#include <string.h>
+#include <signal.h>
+#include <unistd.h>
+#ifdef KTEST
+#include "../kselftest.h"
+#else
+static inline int ksft_exit_pass(void)
+{
+ exit(0);
+}
+static inline int ksft_exit_fail(void)
+{
+ exit(1);
+}
+#endif
+
+#define NSEC_PER_SEC 1000000000L
+
+/* clear NTP time_status & time_state */
+int clear_time_state(void)
+{
+ struct timex tx;
+ int ret;
+
+ tx.modes = ADJ_STATUS;
+ tx.status = 0;
+ ret = adjtimex(&tx);
+ return ret;
+}
+
+#define NUM_FREQ_VALID 32
+#define NUM_FREQ_OUTOFRANGE 4
+#define NUM_FREQ_INVALID 2
+
+long valid_freq[NUM_FREQ_VALID] = {
+ -499<<16,
+ -450<<16,
+ -400<<16,
+ -350<<16,
+ -300<<16,
+ -250<<16,
+ -200<<16,
+ -150<<16,
+ -100<<16,
+ -75<<16,
+ -50<<16,
+ -25<<16,
+ -10<<16,
+ -5<<16,
+ -1<<16,
+ -1000,
+ 1<<16,
+ 5<<16,
+ 10<<16,
+ 25<<16,
+ 50<<16,
+ 75<<16,
+ 100<<16,
+ 150<<16,
+ 200<<16,
+ 250<<16,
+ 300<<16,
+ 350<<16,
+ 400<<16,
+ 450<<16,
+ 499<<16,
+};
+
+long outofrange_freq[NUM_FREQ_OUTOFRANGE] = {
+ -1000<<16,
+ -550<<16,
+ 550<<16,
+ 1000<<16,
+};
+
+#define LONG_MAX (~0UL>>1)
+#define LONG_MIN (-LONG_MAX - 1)
+
+long invalid_freq[NUM_FREQ_INVALID] = {
+ LONG_MAX,
+ LONG_MIN,
+};
+
+int validate_freq(void)
+{
+ struct timex tx;
+ int ret, pass = 0;
+ int i;
+
+ clear_time_state();
+
+ memset(&tx, 0, sizeof(struct timex));
+ /* Set the leap second insert flag */
+
+ printf("Testing ADJ_FREQ... ");
+ for (i = 0; i < NUM_FREQ_VALID; i++) {
+ tx.modes = ADJ_FREQUENCY;
+ tx.freq = valid_freq[i];
+
+ ret = adjtimex(&tx);
+ if (ret < 0) {
+ printf("[FAIL]\n");
+ printf("Error: adjtimex(ADJ_FREQ, %ld - %ld ppm\n",
+ valid_freq[i], valid_freq[i]>>16);
+ pass = -1;
+ goto out;
+ }
+ tx.modes = 0;
+ ret = adjtimex(&tx);
+ if (tx.freq != valid_freq[i]) {
+ printf("Warning: freq value %ld not what we set it (%ld)!\n",
+ tx.freq, valid_freq[i]);
+ }
+ }
+ for (i = 0; i < NUM_FREQ_OUTOFRANGE; i++) {
+ tx.modes = ADJ_FREQUENCY;
+ tx.freq = outofrange_freq[i];
+
+ ret = adjtimex(&tx);
+ if (ret < 0) {
+ printf("[FAIL]\n");
+ printf("Error: adjtimex(ADJ_FREQ, %ld - %ld ppm\n",
+ outofrange_freq[i], outofrange_freq[i]>>16);
+ pass = -1;
+ goto out;
+ }
+ tx.modes = 0;
+ ret = adjtimex(&tx);
+ if (tx.freq == outofrange_freq[i]) {
+ printf("[FAIL]\n");
+ printf("ERROR: out of range value %ld actually set!\n",
+ tx.freq);
+ pass = -1;
+ goto out;
+ }
+ }
+
+
+ if (sizeof(long) == 8) { /* this case only applies to 64bit systems */
+ for (i = 0; i < NUM_FREQ_INVALID; i++) {
+ tx.modes = ADJ_FREQUENCY;
+ tx.freq = invalid_freq[i];
+ ret = adjtimex(&tx);
+ if (ret >= 0) {
+ printf("[FAIL]\n");
+ printf("Error: No failure on invalid ADJ_FREQUENCY %ld\n",
+ invalid_freq[i]);
+ pass = -1;
+ goto out;
+ }
+ }
+ }
+
+ printf("[OK]\n");
+out:
+ /* reset freq to zero */
+ tx.modes = ADJ_FREQUENCY;
+ tx.freq = 0;
+ ret = adjtimex(&tx);
+
+ return pass;
+}
+
+
+int main(int argc, char **argv)
+{
+ if (validate_freq())
+ return ksft_exit_fail();
+
+ return ksft_exit_pass();
+}
--
1.9.1
--
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